<VV> Drippy Carbs?

[Joe West]

From gyoungwolf at earthlink.net Sat Oct 29 18:59:54 2005
From: gyoungwolf at earthlink.net (grant young)
Date: Sat Oct 29 18:59:57 2005
<VV> Drippy Carbs?
Message-ID: <380-2200510629225954859@earthlink.net>

I have been asked to help trouble shoot a carb problem, but am somewhat
baffled by it. These are semi-fresh rebuilds on a just completely rebuilt
140 engine. The car starts, idles, and drives okay and is getting 25 mpg.
But, it is hard to start when warm. This is probably due to the problem of
all four carbs dripping fuel into the engine after shut down. The owner had
a new fuel pump, but replaced it with the old one and the problem
continues. If it were a single carb, I would guess that there was a bad
float or loose/dirty inlet seat. But all four??? Input appreciated.
Thanks,
The (baffled) carbmeister

[Joe West]

From BobHelt at aol.com Sat Oct 29 21:08:24 2005
From: BobHelt at aol.com (BobHelt@aol.com)
Date: Sat Oct 29 21:08:31 2005
<VV> Drippy Carbs?
Message-ID: <193.4b9e0b93.30957708@aol.com>

In a message dated 10/29/05 4:00:35 PM Pacific Daylight Time,
gyoungwolf@earthlink.net writes:

> , I would guess that there was a bad
> float or loose/dirty inlet seat. But all four??? Input appreciated.
> Thanks,
> The (baffled) carbmeister
>
>
>

Grant,
Check the fuel pump pressure. As I remember, the large spring on top of the
pump (under the cover) controls the pressure. You can play with that spring
some.
Regards,

[Joe West]

From djtcz at comcast.net Sat Oct 29 23:11:17 2005
From: djtcz at comcast.net (djtcz@comcast.net)
Date: Sat Oct 29 23:11:33 2005
<VV> Re: Drippy Carbs?
Message-ID: <103020050311.25359.436439D5000414E30000630F2200734 076960C9B060B@comcast.net>

-------------- Original message --------------


Message: 3

I have been asked to help trouble shoot a carb problem, but am somewhat
baffled by it. These are semi-fresh rebuilds on a just completely rebuilt
140 engine. The car starts, idles, and drives okay and is getting 25 mpg.
But, it is hard to start when warm. This is probably due to the problem of
all four carbs dripping fuel into the engine after shut down. The owner had
a new fuel pump, but replaced it with the old one and the problem
continues. If it were a single carb, I would guess that there was a bad
float or loose/dirty inlet seat. But all four??? Input appreciated.
Thanks,
The (baffled) carbmeister

=======================================
I'd stop the warm engine and look down the carb throats with a flashlight for a while.

I'd also ask the owner to duplicate the problem in my presence.
A "throttle pumper" can flood a warm engine pretty quick.
When things are right minimal throttle work is required even on non-FI engines.

[Joe West]

From chelvis at camano.net Sun Oct 30 01:30:30 2005
From: chelvis at camano.net (Bill Chellis)
Date: Sun Oct 30 02:21:54 2005
<VV> Re: Drippy Carbs
References: <20051030005042.48C716C08F@tiger.skiblack.com>
Message-ID: <001501c5dd13$0b3580a0$c170fea9@chelvis>

I have been experiencing a similar condition on my 140 since I bought it in
May,
although it is currently running on the primaries only. The carbs have been
rebuilt once, and are out now having the throttle shafts rebuilt. The
needle/seats
have been replaced twice and the float levels have been lowered, yet the
condition
continues. Please CC me with any troubleshooting ideas because I am also
baffled.

Thanks.

Bill Chellis
----------------------------------------------------------------------------
--------------------------------------

[Joe West]

Message: 3
Date: Sat, 29 Oct 2005 18:59:54 -0400
From: "grant young" <gyoungwolf@earthlink.net>
<VV> Drippy Carbs?
To: virtualvairs@corvair.org
Message-ID: <380-2200510629225954859@earthlink.net>
Content-Type: text/plain; charset=US-ASCII

I have been asked to help trouble shoot a carb problem, but am somewhat
baffled by it. These are semi-fresh rebuilds on a just completely rebuilt
140 engine. The car starts, idles, and drives okay and is getting 25 mpg.
But, it is hard to start when warm. This is probably due to the problem of
all four carbs dripping fuel into the engine after shut down. The owner had
a new fuel pump, but replaced it with the old one and the problem
continues. If it were a single carb, I would guess that there was a bad
float or loose/dirty inlet seat. But all four??? Input appreciated.
Thanks,
The (baffled) carbmeister

[Joe West]

Somewhere between Reno, NV and Coos Bay, Or.
From NicolCS at aol.com Sun Oct 30 10:51:19 2005
From: NicolCS at aol.com (NicolCS@aol.com)
Date: Sun Oct 30 10:51:28 2005
<VV> Drippy Carbs?
Message-ID: <1c8.34ab27cc.309645f7@aol.com>

Fuel pressure could be an issue, I understand there's a way to drill a
pinhole sized pressure-relief bypass orifice in the fuel pump to bleed-off the
pressure after the engine is stopped. Even more likely is percolating fuel. Are
all the insulators in place? Does the engine run unusally high engine
temperatures? Are the floats too high? If the insulators are all in place, the first
thing I would do would be to change fuels - a good premium fuel from a top
brand-name.
Craig Nicol



<snip>I have been asked to help trouble shoot a carb problem, but am somewhat
baffled by it. These are semi-fresh rebuilds on a just completely rebuilt
140 engine. The car starts, idles, and drives okay and is getting 25 mpg.
But, it is hard to start when warm. This is probably due to the problem of
all four carbs dripping fuel into the engine after shut down. The owner had
a new fuel pump, but replaced it with the old one and the problem
continues. If it were a single carb, I would guess that there was a bad
float or loose/dirty inlet seat. But all four??? Input appreciated.
Thanks,

[Joe West]

From BobHelt at aol.com Sun Oct 30 11:26:59 2005
From: BobHelt at aol.com (BobHelt@aol.com)
Date: Sun Oct 30 11:27:05 2005
<VV> Re: Drippy Carbs
Message-ID: <ea.74dc5edc.30964e53@aol.com>

In a message dated 10/29/05 11:22:20 PM Pacific Standard Time,
chelvis@camano.net writes:

> I have been experiencing a similar condition on my 140 since I bought it in
> May,
> although it is currently running on the primaries only. The carbs have been
> rebuilt once, and are out now having the throttle shafts rebuilt. The
> needle/seats
> have been replaced twice and the float levels have been lowered, yet the
> condition
> continues. Please CC me with any troubleshooting ideas because I am also
> baffled.
>
> Thanks.
>
> Bill Chellis
>
Bill,
If the secs are dripping gas, this is a strange situation, unless you have
1968-69 secs. There is no idle ckt in the secs. You have to have one or more of
these: Sunk float. Bowl level too high, bad inlet valve or too much pump
pressure.

Same things apply to the primary carbs too.
Regards,

[Joe West]

Somewhere between Reno, NV and Coos Bay, Or.
From bryan at skiblack.com Sun Oct 30 12:03:51 2005
From: bryan at skiblack.com (Bryan Blackwell)
Date: Sun Oct 30 12:03:46 2005
<VV> Re: Drippy Carbs
In-Reply-To: <001501c5dd13$0b3580a0$c170fea9@chelvis>
References: <20051030005042.48C716C08F@tiger.skiblack.com>
<001501c5dd13$0b3580a0$c170fea9@chelvis>
Message-ID: <2024e5b9d16fa88d7c3dc737b65526cc@skiblack.com>

The two simple things that come to mind are missing insulators or too
much fuel pressure.

--Bryan

On Oct 30, 2005, at 1:30 AM, Bill Chellis wrote:

> I have been experiencing a similar condition on my 140 since I bought
> it in
> May,
> although it is currently running on the primaries only. The carbs have
> been
> rebuilt once, and are out now having the throttle shafts rebuilt. The
> needle/seats
> have been replaced twice and the float levels have been lowered, yet
> the
> condition
> continues. Please CC me with any troubleshooting ideas because I am
> also
> baffled.

[Joe West]

From deltainc at grm.net Sun Oct 30 21:36:21 2005
From: deltainc at grm.net (Ken Campbell)
Date: Sun Oct 30 21:35:40 2005
<VV> Drippy Carbs?

[Joe West]

References: <1c8.34ab27cc.309645f7@aol.com>
Message-ID: <004b01c5ddc3$e1c0fe50$d97b8bd8@deltaone>


<VV> Drippy Carbs?

I had a problem with hot - not starting a couple years ago ... I fixed it
accidentally when I installed a new set of Sethman's Plug Wires ....

hard to "connect" those dots, except maybe weak ignition ...

If I shut if off hot, it wouldn[t start for about 3 or 4 minutes, then would
start .... ??????? how embarrassing; I never did actually figure it out ...
'66 110 2 carb stocker manual ...
*********
ken campbell, amazed in iowuh



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[Joe West]

Craig Nicol
From N2VZD at aol.com Sun Oct 30 23:05:42 2005
From: N2VZD at aol.com (N2VZD@aol.com)
Date: Sun Oct 30 23:14:37 2005
<VV> Re: DRIPPING CARBS
Message-ID: <1a7.42c54e64.3096f216@aol.com>

if all carbs were rebuilt at the same time did the floats all get adjusted
too high? thats the only thing i have run into other than a loose seat . i ilke
the viton tip needles or stock steel not the fancy ball or other radicle
needles. also sometimes wrong needles like quadajet get into corvair stuff and
have larger feed holes, which can sometimes(not always) cause troubles. this can
be hard to notice . i use a fuel pressure gauge on a special fuel line to
fit the left side of the engine to double check pressures if i have suspecteed
high pressure. i must be lucky because i have never encountered excessive
pressure on any of my vairs.. i did get some bad gas that seemed to harden rubber
parts , including the rubber part of the gas control valve in my gas heater
and rubber coupling hoses once..made me think i had a bad regulator..boy that
was exciting! could not shut off gas to the heater with engine running..creates
a hot time in the nose of your fc. the carbs also got new viton tip needles
after i found that.